base/file_path.h defines two macros with exactly the same value and for the same use case of providing the %-format for use in printf-like format function. They are called PRIsFP (11 references on codesearch) and PRFilePath (24 references on codesearch).


// To print path names portably use PRIsFP (based on PRIuS and friends from
// C99 and format_macros.h) like this:
// base::StringPrintf("Path is %" PRIsFP ".\n", path.value().c_str());
#if defined(OS_WIN)
#define PRIsFP "ls"
#elif defined(OS_POSIX) || defined(OS_FUCHSIA)
#define PRIsFP "s"
#endif  // OS_WIN

// Macros for string literal initialization of FilePath::CharType[], and for
// using a FilePath::CharType[] in a printf-style format string.
#if defined(OS_WIN)
#define FILE_PATH_LITERAL(x) L ## x
#define PRFilePath "ls"
#elif defined(OS_POSIX) || defined(OS_FUCHSIA)
#define FILE_PATH_LITERAL(x) x
#define PRFilePath "s"
#endif  // OS_WIN

We should probably remove one of the two macros.